| (19) |
 |
|
(11) |
EP 0 311 370 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
06.03.1991 Bulletin 1991/10 |
| (43) |
Date of publication A2: |
|
12.04.1989 Bulletin 1989/15 |
| (22) |
Date of filing: 05.10.1988 |
|
| (51) |
International Patent Classification (IPC)4: C09J 163/00 |
|
| (84) |
Designated Contracting States: |
|
CH DE FR GB IT LI NL |
| (30) |
Priority: |
08.10.1987 US 106727
|
| (71) |
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY |
|
St. Paul,
Minnesota 55133-3427 (US) |
|
| (72) |
Inventor: |
|
- Marteness, Bruce A.
c/o Minnesota Mining and
St. Paul
Minnesota 55144-1000 (US)
|
| (74) |
Representative: Baillie, Iain Cameron et al |
|
c/o Ladas & Parry
Altheimer Eck 2
80331 München
80331 München (DE) |
|
| |
|
| (54) |
Phenolic-modified epoxy adhesive |
(57) Viscous oligomeric epoxy resins can be quickly cured at temperatures of 100° C. by
incorporating a hardener that is a blend of (a) the oligomeric reaction product of
bisphenol A and bisphenol A monoglycidyl ether and (b) an imidazole. The cured resins
are tough and resistant to both moisture and high temperatures. Prepregs, in which
glass, graphite or polymeric organic fiber sheets are saturated with these resins,
are particularly useful in the repair of damaged aircraft and aerospace structures.